[quote=Doorman]A question came up in my science class today about the deepest that a human can go underwater. Does anybody know how far it is possible to go or a record of how deep someone went. This includes using special equipment, as long as it is not some kind of submarine. Thank you. The sooner the better! [/quote]Recreational diving limit is 100ft not 130ft on a 20% mix witch is what we now breath 20% o2 79% nitrogen and 1% other! Anything over that would be a Nitrox Mix or a trimix witch uses healium.

Yes, but the original question was "What is the deepest that a diver is physically able to go?"

Narcosis is very subjective. It can be felt one day and not the next, by one diver in the group, but no other. A diver can go for many, many years and not fall subject to it then one day suffer an extreme case of it. Scientists have been trying to unravel its secret for many years.

[quote=BobG]Yes, but the original question was "What is the deepest that a diver is physically able to go?"

Narcosis is very subjective. It can be felt one day and not the next, by one diver in the group, but no other. A diver can go for many, many years and not fall subject to it then one day suffer an extreme case of it. Scientists have been trying to unravel its secret for many years. [/quote]